Effects of polarization mode coupling and superposition in a whispering-gallery microresonator

A. T. Rosenberger

doi:10.1117/12.2047532

21 February 2014 Effects of polarization mode coupling and superposition in a whispering-gallery microresonator

A. T. Rosenberger

Proceedings Volume 8998, Advances in Slow and Fast Light VII; 899813 (2014) https://doi.org/10.1117/12.2047532
Event: SPIE OPTO, 2014, San Francisco, California, United States

Abstract

The throughput of a single fiber-coupled whispering-gallery microresonator, such as a fused-silica microsphere, can exhibit induced transparency or absorption, leading to pulse delay or advancement, through the interaction of two coresonant orthogonally polarized whispering-gallery modes having very different quality factors (Q). There are two ways by which these behaviors may be realized. The first method, coupled-mode induced transparency and absorption (CMIT, CMIA), relies on intracavity cross-polarization coupling when only one mode is driven. The second method, coresonant polarization induced transparency and absorption (CPIT, CPIA), uses a simple superposition of orthogonal throughputs (in the absence of intracavity cross-polarization mode coupling) when the two modes are simultaneously driven. In both cases, the throughput behavior is observed on the same polarization component as that of the linearly polarized input. The pulse delay or advancement can be enhanced by taking advantage of the multimode capability of the tapered-fiber coupler, an advantage that is not available to free-space-beam-driven ring resonators. Some predictions of a numerical model for this enhancement, which assumes experimentally realistic conditions, are presented here.

Citation Download Citation

A. T. Rosenberger "Effects of polarization mode coupling and superposition in a whispering-gallery microresonator", Proc. SPIE 8998, Advances in Slow and Fast Light VII, 899813 (21 February 2014); https://doi.org/10.1117/12.2047532

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